Based on the construction of a complete information-dynamic game model with the central government, local government and migrant workers as three main bodies in three phases, this paper makes a game analysis on government and the individual behavior in the process of the urbanization of rural migrant workers. It is found that in different areas the equilibrium solution is different in different periods, the game equilibrium (block, block, do not become citizens) plays a dominant role for a long time in our country, which leads to the slow process of urbanization of rural migrant workers. The direct cause of slow urbanization of migrant workers is that the central government, local government and the interests of the subject of migrant workers do not match in terms of interests, the root cause is the unequality in central and local financial powers and responsibilities under the background of the fiscal decentralization to local governments as well as the GDP-cored performance assessment methods central government enforced on local government.